As an Ice Cube Floating in a Glass of Water

Multiple Choice

As an ice cube floating in a glass of water melts, what happens to the water level?

A) The water level rises to the point where the ice floats above the water.
B) As the ice melts, the water level does not change-the melting ice "caves in" and exactly fills the open spaces.
C) The melting ice "caves in" and fills the open spaces-therefore the water level is lower after the ice melts.